A former small surface and underground Cu-Al-Zn-Pb-Mo-Au-K-Clay mine located in the center of the SW¼ sec. 21, T22S, R16E, 2.5 miles SE of Patagonia, on National Forest land. Discovered 1970 (Cu). Owned and operated by Kerr-Mc Gee Oil Industries, Inc., Earth Sciences, Inc. (1966). Claims extend into sections 20 and 17, on the northern and eastern slopes of Red Mountain. USBM gives section as 20 and longitude of 110-44-14W.

Mineralization is a porphyry copper deposit with hypogene enrichment of fractured intrusives. Gossan and some oxidized copper on surface indicates surface ozidation and leaching. Felsic volcanic rocks are pervasively altered solfatarically. Ore control was disseminations of chalcopyrite, bornite, and molybdenite in porous fractured intrusives at great depths. Alteration is high pyritic phyllic alteration surrounded by pyritic-argillic and propyllitic alteration. With depth sulphur decreases and changes from near-surface sulphur-rich phyllitic alteration, through weak potassic alteration, to low-sulphur potassic alteration at depth. Alunitization and silicification.

The Red Mountain volcanics have been correlated with the Gringo Gulch Volcanics to the north and west, which give above K/Ar dates. The Red Mountain Volcanics overlie trachyandesite of Meadow Valley dated at 72.1 +/- 2.2 M.Y. (Simons, F.S., 1974). Basal contact between tuffaceous volcanics and underlying trachyandesite is roughly horizontal. The thickness of the Red Mountain Volcanics is estimated at 1500 feet.

Local structures. In the Patagonia Mountains the dominant structural features are major NW-trending, high-angle faults. This includes the Harshaw Creek Fault. The Patagonia Fault is a major NE-trending fault. E-W and N-S-trending faults are found in Tertiary volcanics.

Tectonic elements include the Red Mountain Fault Block with downthrow to the north.

Workings included over 10 drill holes for copper exploration, a few over 1000 feet deep, and a 688 foot exploration tunnel into the mountain. Workings on the Ten Grand claim included a 1500 foot tunnel. Alunite exploration consisted of surface drilling only (no mining).

The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.